Abstract
In this paper, a finite-time control strategy based on back-stepping method combining with a terminal sliding mode control (TSMC) and a nonlinear disturbance observer (NDO) is proposed for the longitudinal dynamic model of hypersonic vehicle (HV). Firstly, the model of HV is transformed into two strict feedback subsystem: the mismatched subsystem of altitude and the matched subsystem of velocity. Then, the TSMC and back-stepping method is incorporated to cope with the unmatched issue in the HV altitude subsystem. In addition, a NDO based on a finite-time-convergent differentiator (FD) is proposed to estimate the lumped disturbances. The finite-time stability condition of the system is established via the Lyapunov theory. Finally, the robustness and effectiveness of the method are verified by simulations.
| Original language | English |
|---|---|
| Pages (from-to) | 4339-4350 |
| Number of pages | 12 |
| Journal | Transactions of the Institute of Measurement and Control |
| Volume | 41 |
| Issue number | 15 |
| DOIs | |
| State | Published - 1 Nov 2019 |
Keywords
- back-stepping method
- finite-time control
- finite-time-conver-gent differentiator
- Hypersonic vehicle
- nonlinear disturbance observer
- terminal sliding mode
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